package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

	@Autowired
	private EmployeeMapper employeeMapper;

	/**
	 * 员工登录
	 *
	 * @param employeeLoginDTO
	 * @return
	 */
	public Employee login(EmployeeLoginDTO employeeLoginDTO) {
		String username = employeeLoginDTO.getUsername();
		String password = employeeLoginDTO.getPassword();

		//1、根据用户名查询数据库中的数据
		Employee employee = employeeMapper.getByUsername(username);

		//2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
		if (employee == null) {
			//账号不存在
			throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
		}

		//密码比对
		//对前端传过来的密码进行md5加密
		password = DigestUtils.md5DigestAsHex(password.getBytes());
		if (!password.equals(employee.getPassword())) {
			//密码错误
			throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
		}

		if (employee.getStatus() == StatusConstant.DISABLE) {
			//账号被锁定
			throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
		}

		//3、返回实体对象
		return employee;
	}

	/**
	 * 新增员工
	 *
	 * @param employeeDTO
	 */
	public void save(EmployeeDTO employeeDTO) {
		System.out.println("当前线程的id：" + Thread.currentThread().getId());
		Employee employee = new Employee();

		//对象属性拷贝
		BeanUtils.copyProperties(employeeDTO, employee);

		//设置账号的状态，默认正常状态 1表示正常 0表示锁定
		employee.setStatus(StatusConstant.ENABLE);

		//设置密码，默认密码123456
		employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));

		//设置当前记录的创建时间和修改时间
		//因为使用了自定义注解和AOP自动填充，所以这里不需要设置这两个字段，下面两句代码可以注释掉
		//employee.setCreateTime(LocalDateTime.now());
		//employee.setUpdateTime(LocalDateTime.now());

		//设置当前记录创建人id和修改人id
		//employee.setCreateUser(BaseContext.getCurrentId());
		//employee.setUpdateUser(BaseContext.getCurrentId());

		employeeMapper.insert(employee);//后续步骤定义
	}

	/**
	 * 分页查询
	 *
	 * @param employeePageQueryDTO
	 * @return
	 */
	public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
		// select * from employee limit 0,10
		//调用分页插件进行分页查询，两个参数为当前页数和每页显示的数量
		//从数据库中查询第employeePageQueryDTO.getPage()页的数据
		//每页显示employeePageQueryDTO.getPageSize()条数据
		PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());
		Page<Employee> page = employeeMapper.pageQuery(employeePageQueryDTO);
		//page.getTotal()方法用于获取数据库中符合条件的所有员工记录的总数
		long total = page.getTotal();
		//page.getResult()方法用于获取当前页的员工记录集合
		List<Employee> records = page.getResult();
		//将查询结果封装成PageResult对象并返回
		return new PageResult(total, records);
	}

	/**
	 * 启用禁用员工账号
	 *
	 * @param status
	 * @param id
	 */
	public void startOrStop(Integer status, Long id) {
		Employee employee = Employee.builder()
				.status(status)
				.id(id)
				.build();

		employeeMapper.update(employee);
	}

	/**
	 * 根据id查询员工
	 *
	 * @param id
	 * @return
	 */
	public Employee getById(Long id) {
		Employee employee = employeeMapper.getById(id);
		//密码脱敏处理,将密码字段值替换成****，保护用户隐私
		employee.setPassword("****");
		return employee;
	}

	/**
	 * 编辑员工信息
	 *
	 * @param employeeDTO
	 */
	public void update(EmployeeDTO employeeDTO) {
		//将dto对象转换成entity对象
		Employee employee = new Employee();
		//对象属性拷贝
		BeanUtils.copyProperties(employeeDTO, employee);

		//设置当前记录的修改时间
		//因为使用了自定义注解和AOP自动填充，所以这里不需要设置这两个字段，下面两句代码可以注释掉
		//employee.setUpdateTime(LocalDateTime.now());
		//设置当前记录修改人id
		//employee.setUpdateUser(BaseContext.getCurrentId());

		employeeMapper.update(employee);
	}
}
